Laminated talking-machine record



V. H. EMERSON.

LAMINATED TALKING MACHINE RECORD. APPLICATION FILED sEPLIzI, 1920.

?. I Patented July 25,1922.

INVENTDR McorHfmerso/w Bv card/@7M u@ MmIzII s VIGTQB- rl'. EMERSON. Ol? NEW YDRIE,

ASSIGNQE TG ElfERSOll PHONOGRAPL COMPANY. INC.. A COREORATION OF NEN YORK.

To all lwhom may concern:

Be it known that l, Vieron lil. EMnnsoN, a citizen of the VUnited States, and resident of New Yorlr city, in the county of New Yorlii and State oi' New Yorkn have invented certain new and useful Improvements in Laminated Talking-lilachine Records7 of which the following is a specication.

My invention relates to improvements inA the construction and manufacture of tallring machine records and similar articles, and is particularly applicable to records of the disk type.

Owing to the relatively high cost of the materials customarily employed in the manufacture of disk records out oic solid homogeneous stock, it has heretofore been proposed to construct such records with a base of paper or other sheet material, surfaced with suiiicient record stock; to receive the record grooves. The fundamental diiliculty with records of this type has been their tendency to warp or become distorted. either as the effect ot heat. which readily influences the relatively thin surface of record stocli:7 or from the iniiuence upon the paper base ot the fluids applied to the surface thereofin the pretreatment ot the base or in the application of the record stock there to. This tendency to distortion has seriously affected the practical and commercial value of composite records ot' this type heretofore manufactured.

A. principal object of my invention is to provide a composite laminated record employingv a base ot sheet material in which the tendency to warp is greatly reduced and under proper conditions is practically eliminated.

Herototore the sheets of paper or similar material employed in laminated records have been of substantial thickness, ordinarily forming` by tar the major portion of the record outside ott the surfacing layer of record stock. l have `found that the tendency to warp is substantially reduced by employing a paper sheet which is relatively thin. and .which will form only a small proportion of the completed record.v

A further object of my invention is to produce a record in which a relatively thin sheet base is used, Without forming the Specification of Letters Patent.

Patenten .nay ieee.

Serial No. 413,160.

maj or portion ot the record from the usually relatively eipensive record stock. For this purpose l employ a filler preferably of fusible material ot bituminous nature applied to the opposite sides ot the base sheet to build up a record body of requisite thiol;- ness.

Another object is to devise a laminated record having a base oit paper or si -..har material so constructed and arranged that practically any of the various common kinds of paper may be employed for the base sheet. thereby reducing the cost ot such sheet and the diiculty of obtainingit in the market.

A further object accomplished in this lareneral way 'is the prevention ot warping by combining; with the base sheet which. produces such tendency a suitable overlying` filler which counteracts and resists such tendency.

As has been stated, sheet fillers ordinarily of fibrous material have heretofore heen employed largely to reduce the cost of record materials. Vhen this object is to be attained the base sheet obviously must be ot substantial thickness5 and is therefore liable to warp, Furthermore, machinery has been developed by means of which a surfacing of record stock may be placed upon a suitably Ytormed base rapidly and cheaply, without resorting to the use ot presses as in the original method ot molding records from solid stock.

A. further important object of my invention is to employ a relatively cheap iiller or body portion which is capable of beine` coated with record stock by a machine of the type indicated without employing` a fibrous material such as paper for the maj or part of such body portion.

Another object is to provide a ller or body for the record which is mainly composed of relatively cheap substance which is readily rendered plastic as by heatj without employing` special apparatus, such as presses, rolls and the like. for forming the body portion into suitable tablets.

A more specific object is to produce such a body portion Which may readily be manufactured on machines of the type above indicated.

plished when the usual record stock is employed by selecting a filler becoming plastic above 2500 F. as above described. This arrangement permits the filler to be applied to the base sheet in plastic form and then hardened, after Which the record stock of any ordinary type may be deposited on the filler While the stock is heated to a point of sutiicient plasticity Without melting the filler. This is important, since the filler necessarily is inferior to the record stock in its ability to receive and retain the record grooves; and melting or fusing ofthe Eller when the stock is applied thereto would result in an uneven outer layer, portions of the ller penetrating to oi' nearly to the outer surface. This would result in soft spots, rendering the record practically useless.

A highly convenient method of manufacturing records of this type is disclosed in my copending application Ser. No. 413,099, tiled September 27, 1920. According to this method, the filler is applied to the base preferably in finely divided form and then fused by suitable heating means to produce a homogeneous layer of the filler in intimate engagement with one side of the base. The thin outer layer of record stock is then applied to the filler, preferably in the same manner, by dusting it on the exposed surface of the filler and then fusing the stock layer by heat properly regulated to prevent fusion of the hardened filler. However, by properly selecting the filler, it may be maintained at a tempera.- ture above the fusing point of the stock, so that the heat in the filler is employed to fuse and amalgamate the stock even though the filler remains hard. The other side of the base may be treated in the same Way, and if desired the process may be made substantially continuous by the employment of suitable automatic machinery.

While I have disclosed the preferred form of my invention and indicated certain variations therein, it Will be apparent that nummer-- ous other changes and substitutions of equivalents may be made Without departing from the invention as defined in the following claims.

l claim:

l. A talking machine record, including` a base of relatively thin sheet material, an intermediate layer of fluXible bituminous material forming the principal bulk of the record., and a thin outer layer of record stock.

2. A talking machine record, including a base consisting of a relatively thin sheet of fibrous material, an intermediate layer of Humble bituminous material forming the principal bulk of the record, and a thin outer layer of record stock.

3. talking machine record, including a hase consisting of a relatively thin sheet of paper, an intermediate layer of fluXible bituminous material forming the principal hulk of the record, and a thin outer layer of record stock.

Il. it, talking machine record, including a base of relatively thin sheet material, an intermediate layer of fusible material oontaining asphaltum and forming the principal bulk of the record, and a thin outer layer of record stock.

5. n. talking machine record, including a base of relatively thin sheet material, an intermediate layer including a bituminous substance and forming t-he principal bulk of the record, and a thin outer layer of record stock.

6. A talking` machine record, including a base of relatively thin sheet material, an intermediate layer including asphaltum and forming the principal bulk of the record, and a thin outer layer of record stock.

T. A talking machine record, including a base of relatively thin sheet material, a fusible intermediate layer containing asphaltum, and an outer layer of record stock fusible at a temperature belovv the fusing point of the intermediate layer.

S. .a talking machine record, including a base of relatively thin sheet material, a relatively thin outer layer of fusible record stock. and an intermediate layer composed largely of a bituminous substance, said intermediate layer fusing at a temperature above the fusingpoint of said record stock.

9. A talking machine record, including a base of relatively thin paper, a tluXible intermediate layer, including a bituminous substance, forming the main bulk of the record, and an outer layer of fluxible record stock.

Signed at New York city in the county of New York and State of New York this 24th day of Sept., A. D. 1920.

. VICTOR H. EMERSGN. 

